interface ClassResolverInterface

interface ClassResolverInterface {
    
    /**
     * Returns a class instance with a given class definition.
     *
     * In contrast to controllers you don't specify a method.
     *
     * @param string $definition
     *   A class name or service name.
     *
     * @return object
     *   The instance of the class.
     *
     * @throws \InvalidArgumentException
     *   If $class is not a valid service identifier and the class does not exist.
     */
    public function getInstanceFromDefinition($definition);

}